definition acute bacterial infection of the mucosa of one or more paranasal sinuses, usually...
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Definition
Acute bacterial infection of the mucosa of one or more paranasal sinuses, usually rhinogenic in origin and is characterized by acute facial pain/ head ache and purulent nasal discharge.
Anatomical considerations:
Osteo-meatal complex
Types
• Depending on the site– Unilateral/ bilateral– Pansinusitis– Multisinusitis– Maxillary/ frontal/ ethmoidal/ sphenoidal
• Depending on whether the sinus is draining or not– Open type– Closed type
• Depending on the pathology– Suppurative– Non-suppurative
Etiology
• Rhinogenic- Commonest (85%)– Usually after viral rhinitis (Flu)– Any form of rhinitis
• Dental (Maxillary)
– Root abscess, dental procedure, etc.
• Trauma– RTA, Swimming and diving, FB, barotrauma, etc.– Iatrogenic- nasal packing, septal surgery
• Hematogenous- Rare
Predisposing factors for Acute rhinosinusitis
• Mucosal odema of MM– Any form of rhinitis: Viral, bacterial, Irritant, allergic, VMR,
atrophic, etc. (environmental factors play role)
• Mechanical (anatomical) obstruction of nose/ MM– DNS, spur, polyp, hypertrophic turbinate, any mass, FB, nasal
packing, etc.
• Pathological mucous– Thick mucous (mucoviscidosis, cystic fibrosis)
• Primary mucociliary dysfunction• Others: Poor general health, immunodeficiency states,
DM, nutritional deficiency, etc.
Bacteriology
• Str.Pneumoniae
• B-hemolytic streptococcus
• H.influenzae
• Stap. Aureus
• Klebsiella pneumoniae
• Others
Pathogenesis
• Obstruction to sinus ostium/ meatus• Stasis of secretions (serous-mucinous): Non-
suppurative• Secondary bacterial invasion: Suppurative• Severity and resolution depends on
– Open/ closed. May drain creating accessory opening.– Organism virulence– Host resistance– Treatment received
Pathology
• Acute inflammatory changes: Hyperemia, odema, acute infl. infliterate.
• Increased activity of the mucous glands• Severe suppuration Mucosal destruction Empyema Bony destruction Complications
Difference between healthy and inflammed Sinus
Clinical features: SymptomsDepends on the sinus involved
• Constitutional symptoms: Fever, malaise, lethargy• Headache/ facial pain: Dull ache, postural/diurnal.
– Max: Facial, forehead– Frontal: Forehead, “Office headache” – Ethmoid: Between the eyes, may > with eye movement– Sphenoid: Vertex, occipetal
• Nasal discharge– mucous/ mucopurulent/ purulent/ blood stained– Anterior/ postnasal
• Nasal obstruction• Cheek/ lid congestion, swelling
Clinical features: SignsDepends on the sinus involved
• Fever
• Tenderness
• Cheek swelling
• Lid odema: in ethmoid and frontal
• Inflamed nasal mucosa especially the meatus
• Discharge in MM/ SM as on anterior/posterior rhinoscopy
• Postural test
• Transillumination test
• Signs of complications
Endoscopic appearance of acute infective sinusitis, with pus exuding from under the right middle turbinate and down into the middle meatus.
Investigations
• Clinical diagnosis• Diagnostic nasal endoscopy (DNE)• Radiological
– X-ray PNS• Water’s view (Occipetomental)• Caldwel view (Occipetofrontal)• Lateral view• Base skull view (Submento-vertical)
– CT scan: indicated in impending complications
• C/S: rarely done
Acute Maxillary Sinusitis
Normal Sinuses
Treatment- Medical
• Antibiotics
• Nasal decongestants (Topical/systemic)
• Anti-inflammatory analgesics
• Medicated steam inhalation
• Mucolytics
• Hot fomentation
Surgical drainage
• If not responding to medical treatment
• Impending or manifest complications
• Depends on the sinus involved
Drainage procedures
• Acute maxillary: Antral washout/ endoscopic MMA
• Acute frontal: Frontal trefination/ endoscopic frontal recess clearance
• Acute ethmoiditis: External ethmoidectomy/ endoscopic ethmoidectomy
• Acute sphenoiditis: External sphenoethmoidectomy/ endoscopic sphenoidotomy
Complications
• Chronic sinusitis• Acute sinusitis or acute exacerbations of
chronic sinusitis may give rise to following complications:
OrbitalIntracranial OsteomyelitisSeptic focus for other infections
Signs of impending/ manifest complications
Spiking feverLid odema, facial/orbital swellingProptosis, reduced vision, reduced extraoccular
movt.Severe headache and hyperirritableProjectile vomitingMeningeal signsHypothermiaAltered sensorium
Orbital complications• Common in acute ethmoiditis or
frontal sinusitis
• Direct spread/ ostitis/ thrombophlebitic
• Odema of the lids
• Subperiosteal abscess
• Orbitial cellulitis
• Orbital abscess
• Superior orbital fissure syndrome: Deep orbital pain, frontal headache, progressive paralysis of extraoccular movements
• Blindness
A patient with acute ethmoiditis threatening
vision
Intracranial
• Anterior cranial fossa and cavernous sinus closely related
• Meningitis
• Extradural abscess
• Subdural abscess
• Frontal lobe abscess
• Cavernous sinus thrombophlebitis, etc
LATERAL SINUS
THROMBOSIS
DELTA SIGN
BRAIN ABSCESS
Conclusion
“Acute sinusitis especially in a child should be treated adequately to prevent
consequent chronic sinusitis or other more severe complications which may
be even fatal”.